Eric, This is probably due to the fact that PDS/E's require a minimum of 1 page per member (Point 14 in Radalsow's summary). Since these are JCL members, I would imagine that a fair number of them are 15-20 line members, with the 4K minimum member size,for an FB-80 dataset that works out to just over 51 records, so any JCL that is under 51 lines will still take up 4K each, while in a PDS an 80 byte member takes 80 bytes in the PDS itself (after the directory of course).
=============================================== Wayne Driscoll OMEGAMON DB2 L3 Support/Development wdrisco(AT)us.ibm.com =============================================== From: Eric Bielefeld <eric-ibmm...@wi.rr.com> To: IBM-MAIN@bama.ua.edu Date: 02/11/2010 09:40 AM Subject: Re: PDS vs. PDSE Sent by: IBM Mainframe Discussion List <IBM-MAIN@bama.ua.edu> I just discovered something about PDS/Es that I don't remember being discussed. This discussion inspired me to copy my JCL PDS to a PDS/E on one of my accounts. Notice that the % full went from 62 to 95%. I used the same blksize. I figured that since the PDS was 62% full, I'd make the PDS/E 2 cylinders less. Here are the results: Tracks % XT Device Dsorg Recfm Lrecl Blksz ------------------------------------------------ $IQLG.JCL.CNTL 120 62 1 3390 PO FB 80 7520 ------------------------------------------------ $IQLG.JCLN.CNTL 120 95 2 3390 PO-E FB 80 7520 That's almost a third more space used. Any comments? I'm sure there are a few who know why that is out there. This PDS has just over a thousand members. Eric -- Eric Bielefeld Systems Programmer IBM MVS Technical Services Dubuque, Iowa 563-845-4363 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
